Il 02/12/2013 17:43, Liu, Jinsong ha scritto: > From fbfa537f690eca139a96c6b2636ab5130bf57716 Mon Sep 17 00:00:00 2001 > From: Liu Jinsong <jinsong.liu@xxxxxxxxx> > Date: Fri, 29 Nov 2013 01:27:00 +0800 > Subject: [PATCH 1/4] X86: Intel MPX definiation > > Signed-off-by: Xudong Hao <xudong.hao@xxxxxxxxx> > Signed-off-by: Liu Jinsong <jinsong.liu@xxxxxxxxx> > --- > arch/x86/include/asm/cpufeature.h | 2 ++ > arch/x86/include/asm/xsave.h | 5 ++++- > 2 files changed, 6 insertions(+), 1 deletions(-) > > diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h > index 89270b4..1b00b01 100644 > --- a/arch/x86/include/asm/cpufeature.h > +++ b/arch/x86/include/asm/cpufeature.h > @@ -216,6 +216,7 @@ > #define X86_FEATURE_ERMS (9*32+ 9) /* Enhanced REP MOVSB/STOSB */ > #define X86_FEATURE_INVPCID (9*32+10) /* Invalidate Processor Context ID */ > #define X86_FEATURE_RTM (9*32+11) /* Restricted Transactional Memory */ > +#define X86_FEATURE_MPX (9*32+14) /* Memory Protection Extension */ > #define X86_FEATURE_RDSEED (9*32+18) /* The RDSEED instruction */ > #define X86_FEATURE_ADX (9*32+19) /* The ADCX and ADOX instructions */ > #define X86_FEATURE_SMAP (9*32+20) /* Supervisor Mode Access Prevention */ > @@ -330,6 +331,7 @@ extern const char * const x86_power_flags[32]; > #define cpu_has_perfctr_l2 boot_cpu_has(X86_FEATURE_PERFCTR_L2) > #define cpu_has_cx8 boot_cpu_has(X86_FEATURE_CX8) > #define cpu_has_cx16 boot_cpu_has(X86_FEATURE_CX16) > +#define cpu_has_mpx boot_cpu_has(X86_FEATURE_MPX) > #define cpu_has_eager_fpu boot_cpu_has(X86_FEATURE_EAGER_FPU) > #define cpu_has_topoext boot_cpu_has(X86_FEATURE_TOPOEXT) > > diff --git a/arch/x86/include/asm/xsave.h b/arch/x86/include/asm/xsave.h > index 0415cda..d3e3ea5 100644 > --- a/arch/x86/include/asm/xsave.h > +++ b/arch/x86/include/asm/xsave.h > @@ -9,6 +9,8 @@ > #define XSTATE_FP 0x1 > #define XSTATE_SSE 0x2 > #define XSTATE_YMM 0x4 > +#define XSTATE_BNDREGS 0x8 > +#define XSTATE_BNDCSR 0x10 > > #define XSTATE_FPSSE (XSTATE_FP | XSTATE_SSE) > > @@ -23,7 +25,8 @@ > /* > * These are the features that the OS can handle currently. > */ > -#define XCNTXT_MASK (XSTATE_FP | XSTATE_SSE | XSTATE_YMM) > +#define XCNTXT_MASK (XSTATE_FP | XSTATE_SSE | XSTATE_YMM | \ > + XSTATE_BNDREGS | XSTATE_BNDCSR) > > #ifdef CONFIG_X86_64 > #define REX_PREFIX "0x48, " > hpa/Ingo/Thomas, can you give your Acked-by for this patch? I'm not sure of the consequences of changing XCNTXT_MASK. This series (which was submitted with the wrong threading) wants it so that KVM can use fpu_save_init and fpu_restore_checking to save and restore the MPX state of the guest. Paolo -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
